Table 1 Patients’ characteristics and preoperative data of VUR

Age at surgery Median (range, month)

39.0 (4.0, 137.0)

45.0 (9.0, 95.0)

<0.001

Gender

 Male

10

11

0.45

 Female

3

8

Height at surgery

84.0 (60.0, 148.0)

104.0 (67.0, 132.0)

<0.001

Weight at surgery

13.0 (6.30, 42.0)

18.0 (5.6, 24.0)

0.80

Surgical side

0.62

 Left

8

10

 Right

3

3

Bilateral

2

6

Pre-operative VCUG grade

0.36

 III

2

3

 IV

6

13

 V

5

3

Pre-operative DRF

36.68 ± 10.25

34.85 ± 10.76

0.64

Following time, median (month, range)

9 (6, 12)

7 (6, 16)

0.88